Yamaha MCX-1000 Service Manual page 3

WARNING: Laser Safety
This product contains a laser beam component. This component may emit invisible, as well as visible radiation, which may
cause eye damage. To protect your eyes and skin from laser radiation, the following precautions must be used during
servicing of the unit.
1) When testing and/or repairing any component within the product, keep your eyes and skin more than 30 cm away from
the laser pick-up unit at all times. Do not stare at the laser beam at any time.
2) Do not attempt to readjust, disassemble or repair the laser pick-up, unless noted elsewhere in this manual.
3) CAUTION: Use of controls, adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
Laser Emitting conditions:
1. This device is a Class IIIb laser device.
Class IIIb means
With the protective case removed, exposure to the light output from the laser, either directly or reflected by a mirror, can
cause harm to the eyes, but there is no danger to the eyes from exposure to dispersed reflected laser light. (Generally 0.5
W or less)
2. Always wear eyeglasses designed for protection against laser light.
3. Always wear gloves.
4. Have no reflective objects anywhere near this device.
5. Figure A shows from where in this device the laser is emitted.
6. When switching on the power to the device for the first time, always measure the laser power with a laser power meter
and check that the power is no greater than the number of Watts in the specifications.
7. Never look directly at the laser light while the laser is emitting light.
8. Do not allow the laser light to shine directly on your skin while the laser is emitting light.
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
This set employs a laser. Therefore, be sure to carefully
follow the instructions below when servicing.
1. Laser Diode Properties
• Material : GaAlAs
• Wavelength : 779-789 nm
• Emission Duration : Pulse
• Laser Output : DC erase mode max. 20mW (Continuous)
Write mode max. 62mW
(Max. Cycle 111 ns, Min. Cycle 30 ns at Max. Speed)
This output is the value measured at the lens of the Laser Pickup
Unit.
2. When checking the laser diode emission, keep your eyes more than
30 cm away from the objective lens.
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous
radiation exposure.
MCX-1000
Laser Radiation Point
Figure A
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